2018 YAMAHA MT-125 fuel

Table of contents
Safety information............................1-1
Description........................................2-1
Left view ..........................................2-1
Right view........................................2-2
Controls and instruments ................2-3
Instrument and control functions....3-1
Main switch/steering lock ...............3-1
Indicator lights and warning
lights ............................................3-2
Multi-function meter unit .................3-4
Handlebar switches.......................3-12
Clutch lever ...................................3-13
Shift pedal .....................................3-14
Brake lever ....................................3-14
Brake pedal ...................................3-15
ABS ...............................................3-15
Fuel tank cap.................................3-16
Fuel................................................3-17
Catalytic converter ........................3-18
Rider seat ......................................3-19
Sidestand ......................................3-20
Ignition circuit cut-off system........3-20
For your safety – pre-operation
checks...............................................4-1
Operation and important riding
points.................................................5-1
Starting the engine ..........................5-2
Shifting ............................................5-3
Tips for reducing fuel
consumption ................................5-4
Engine break-in ...............................5-4
Parking ............................................5-5
Periodic maintenance and
adjustment........................................6-1
Owner’s tool kit ...............................6-2
Periodic maintenance chart for the
emission control system ..............6-3
General maintenance and
lubrication chart ...........................6-4
Removing and installing cowlings ...6-7
Checking the spark plug .................6-8Engine oil and oil filter element ....... 6-9
Coolant ......................................... 6-12
Replacing the air filter element
and cleaning the check hose..... 6-14
Checking the engine idling
speed......................................... 6-14
Adjusting the throttle grip free
play ............................................ 6-15
Valve clearance ............................. 6-16
Tires .............................................. 6-16
Cast wheels .................................. 6-19
Adjusting the clutch lever free
play ............................................ 6-19
Checking the front brake lever
free play ..................................... 6-20
Adjusting the brake pedal free
play ............................................ 6-21
Brake light switches ...................... 6-21
Checking the front and rear brake
pads........................................... 6-22
Checking the brake fluid level....... 6-23
Changing the brake fluid............... 6-24
Drive chain slack ........................... 6-24
Cleaning and lubricating the drive
chain .......................................... 6-26
Checking and lubricating the
cables ........................................ 6-26
Checking and lubricating the
throttle grip and cable ............... 6-27
Checking and lubricating the
brake and clutch levers ............. 6-27
Checking and lubricating the
brake pedal................................ 6-28
Checking and lubricating the
sidestand ................................... 6-28
Lubricating the swingarm
pivots ......................................... 6-29
Checking the front fork ................. 6-29
Checking the steering ................... 6-30
Checking the wheel bearings ....... 6-30
Battery .......................................... 6-31
Replacing the fuses ...................... 6-32
Replacing the headlight bulb ........ 6-33
Auxiliary lights ............................... 6-35
Tail/brake light .............................. 6-35
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Safety information
1-5
1 operator and may limit control
ability, therefore, such accesso-
ries are not recommended.
Use caution when adding electri-
cal accessories. If electrical ac-
cessories exceed the capacity of
the motorcycle’s electrical sys-
tem, an electric failure could re-
sult, which could cause a
dangerous loss of lights or engine
power.
Aftermarket Tires and Rims
The tires and rims that came with your
motorcycle were designed to match
the performance capabilities and to
provide the best combination of han-
dling, braking, and comfort. Other
tires, rims, sizes, and combinations
may not be appropriate. Refer to page
6-16 for tire specifications and more in-
formation on replacing your tires.
Transporting the Motorcycle
Be sure to observe following instruc-
tions before transporting the motorcy-
cle in another vehicle.
Remove all loose items from the
motorcycle.
Check that the fuel cock (if
equipped) is in the “OFF” position
and that there are no fuel leaks.
Point the front wheel straight
ahead on the trailer or in the truck
bed, and choke it in a rail to pre-
vent movement.
Shift the transmission in gear (for
models with a manual transmis-
sion).
Secure the motorcycle with tie-
downs or suitable straps that are
attached to solid parts of the mo-torcycle, such as the frame or up-
per front fork triple clamp (and not,
for example, to rubber-mounted
handlebars or turn signals, or
parts that could break). Choose
the location for the straps carefully
so the straps will not rub against
painted surfaces during transport.
The suspension should be com-
pressed somewhat by the tie-
downs, if possible, so that the mo-
torcycle will not bounce exces-
sively during transport.
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Instrument and control functions
3-2
3From the “LOCK” position, push the
key and turn it to “OFF”.
EAU49399
Indicator lights and warning
lights
EAU11022Turn signal indicator light “ ”
This indicator light flashes when a turn
signal light is flashing.
EAU11061Neutral indicator light “ ”
This indicator light comes on when the
transmission is in the neutral position.
EAU11081High beam indicator light “ ”
This indicator light comes on when the
high beam of the headlight is switched
on.
EAU11341Fuel level warning light “ ”
This warning light comes on when the
fuel level drops below approximately
3.0 L (0.79 US gal, 0.66 Imp.gal). When
this occurs, refuel as soon as possible.
1. Turn signal indicator light “ ”
2. Neutral indicator light “ ”
3. High beam indicator light “ ”
4. Tachometer high-rpm warning light
5. Fuel level warning light “ ”
6. Engine trouble warning light “ ”
7. Anti-lock Brake System (ABS) warning
light “ ”
Lo
Hi
1/2
x1000r/min
ZAUM1316SELECTRESET
km/L/100kmMPGkm/h
MPH
ODOFTRIP12OILOIL
1235467
ABS
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Instrument and control functions
3-4
3come on to indicate that the function is
activated or the light will go off to indi-
cate that the function is deactivated.
EAUM3423
Multi-function meter unit
TIP
When the key is turned to “ON”, all
display segments of the multi-
function meter unit will momen-
tarily appear in order to test the
electrical circuit. The speedome-
ter, tachometer, fuel meter and
coolant temperature meter will
then perform a display check and
a welcome message will scroll
across the multi-function display.
1. “INFO” switch
2. “RESET” button
3. “SELECT” button
1. Coolant temperature meter
2. Tachometer
3. Fuel meter
4. Odometer/tripmeter/fuel reserve tripmeter
5. Clock
6. Speedometer
7. Multi-function display
Lo1/2ODO
ZAUM1299
SELECTRESET
INFO
km/L/100kmMPGkm/h
MPH
ODOFTRIPx1000r/minOILOIL
23
1
Lo
Hi
1/2
x1000r/min
ZAUM1464
km/h
ODOOIL
123
4567
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Instrument and control functions
3-6
32. Push the “SELECT” button for two
seconds, and the hour digits will
start flashing.
3. Use the “RESET” button to set the
hours.
4. Push the “SELECT” button, and
the minute digits will start flashing.
5. Use the “RESET” button to set the
minutes.
6. Push the “SELECT” button to con-
firm settings and start the clock.
TIP
When setting the hours and minutes, a

creases the increment value one by
one. You may also push and hold the
button to increase the value continu-
ously.
Fuel meter
The fuel meter indicates the amount of
fuel in the fuel tank. The display seg-
ments of the fuel meter disappear from
“F” (full) towards “E” (empty) as the fuel
level decreases. When the fuel level
becomes low, the last segment will
flash and the fuel level warninglight “ ” will come on (“LOW FUEL”
message will also appear). Refuel as
soon as possible.
TIP
If a problem is detected in the fuel me-
ter electrical circuit, all display seg-
ments of the fuel meter will flash eight
times, then go off for 3 seconds, re-
peatedly. If this occurs, have your
Yamaha dealer check the vehicle.
Coolant temperature meter
The coolant temperature meter indi-
cates the temperature of the coolant,
and therefore the engine. When the
coolant temperature is at its upper lim-
it, the second segment from the top
will start to flash. Should this occur, re-
duce the load on the engine by riding at
a moderate pace, at low rpm, until the
coolant temperature goes down. If the
top two segments and “ ” start flash-
ing (“HIGH TEMP” message will also
appear), stop the vehicle and let the
engine cool.
1. Fuel meter
2. Fuel level warning light “ ”
3. Fuel reserve tripmeter
4. Information display
Lo
Hi
1/2
x1000r/min
ZAUM1303
km/h
FTRIP
21
34
1. Coolant temperature warning indicator Ž
2. Information display
3. Coolant temperature meter
Lo
Hi
ZAUM1304
31
2
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Instrument and control functions
3-7
3
NOTICE
ECA10022
Do not continue to operate the en-
gine if it is overheating.
TIP
Coolant temperature varies with
changes in the weather and en-
gine load.
The radiator fan will automatically
switch on or off according to the
coolant temperature.
If the engine overheats, see page
6-39 for further instruction.
Odometer and tripmeter display
The odometer and tripmeter display is
equipped with:
an odometer
two tripmeters
a fuel reserve tripmeter
Push the “SELECT” button to switch
between the odometer and the tripme-
ters in the following order:
ODO (odometer) → TRIP 1 (tripmeter)
→ TRIP 2 (tripmeter) → ODO (odome-
ter)When approximately 3.0 L (0.79 US
gal, 0.66 Imp.gal) of fuel remains in the
fuel tank, the display will automatically
change to the fuel reserve tripmeter
mode “F TRIP” and start counting the
distance traveled from that point. In
this case, push the “SELECT” button
to switch the display in the following
order:
F TRIP → ODO → TRIP 1 → TRIP 2 →
F TRIP
To manually reset a tripmeter, select it
with the “SELECT” button, and then
push the “RESET” button for two sec-
onds.
TIP
The fuel reserve tripmeter will re-
set automatically and disappear
after you have refueled and turned
the key to “OFF”.
The tripmeters will automatically
reset and continue counting after
999.9 is reached.
The odometer will lock at 199999
and cannot be reset.
1. Odometer/tripmeter/fuel reserve tripmeter
1/2
ZAUM1305
TRIP1
1
1. Odometer/tripmeter/fuel reserve tripmeter
1/2
ZAUM1306
F TRIP
1
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Instrument and control functions
3-8
3Multi-function display
The multi-function display can show:
instantaneous fuel consumption
average fuel consumption
average speed
elapsed trip time
distance traveled since last oil ser-
vice
warning and service messages
Push the “INFO” button to switch be-
tween average fuel consumption “C
Ave__._km/L” or “C Ave __._ L/100
km”, instantaneous fuel consumption
“C INS__._km/L” or “C INS__._L/100
km”, elapsed trip time “TRIP TIME _h
__min”, average speed “AVE
SPEED/__km/h”, and the oil change
tripmeter (distance since last oil ser-
vice) “DIST SERV/__km” in the follow-
ing order:
C Ave__._km/L → C Ave __._ L/100 km
→ C INS__._km/L → C INS__._L/100
km → TRIP TIME _h __min → AVE
SPEED/__km/h → DIST SERV/__km
For the UK, when miles have been se-
lected:Push the “INFO” button to switch be-
tween the average fuel consumption
mode “C Ave__._mpg”, the instanta-
neous fuel consumption mode “C
INS__._mpg”, the trip time mode “TRIP
TIME _h __min”, the average speed
“AVE SPEED/__mph”, and the oil
change tripmeter (distance since last
oil service) “DIST SERV/__km” in the
following order:
C Ave__._mpg → C INS__._mpg →
TRIP TIME _h __min → AVE
SPEED/__mph → DIST SERV/__miles
Average fuel consumption “C AVE”
Average fuel consumption can be dis-
played in “AVE_ _._ km/L” or “AVE_ _._
L/100 km”, or in “AVE_ _._ MPG” for
the UK.
“AVE_ _._ km/L”: The average dis-
tance that can be traveled on 1.0 L
of fuel.
“AVE_ _._ L/100 km”: The average
amount of fuel necessary to travel
100 km.
“AVE_ _._ MPG”: The average dis-
tance that can be traveled on
1.0 Imp.gal of fuel.
1. Multi-function display
Lo
Hi
ZAUM1307km/L
OIL
1
Lo
Hi
ZAUM1309km/L L/100km
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Instrument and control functions
3-9
3
TIP
To reset the average fuel con-
sumption, push the “RESET” but-
ton for two seconds. However, the
odometer and tripmeter display
must be set to “ODO”, otherwise
the tripmeter will be reset instead.
After resetting the average fuel
consumption, “_ _._” is shown un-
til the vehicle has traveled a suffi-
cient distance.
Instantaneous fuel consumption “C
INS”
Instantaneous fuel consumption can
be displayed in “km/L” or “L/100 km”,
or in “MPG” for the UK.
“km/L”: The distance that can be
traveled on 1.0 L of fuel under cur-
rent riding conditions.
“L/100 km”: The amount of fuel
necessary to travel 100 km under
current riding conditions.
“MPG”: The distance that can be
traveled on 1.0 Imp.gal of fuel un-
der current riding conditions.
TIP
If traveling at speeds under 10 km/h (6

Average speed “AVE SPEED”
Average speed wll be displayed in
“AVE SPEED_ _._ km/h”. For the UK,
when miles have been set, “AVE
SPEED __._ mph” will be displayed in-
stead.
 “AVE SPEED_ _._ km/h”: Your av-
erage traveling speed in kilome-
ters per hour.
“AVE SPEED_ _._ mph”: Your av-
erage traveling speed in miles per
hour.
TIP
The average speed display will re-
set automatically 4 hours after the
key was last turned to “OFF”.
To manually reset the average
speed display, push the “RESET”
button for two seconds. However,
the odometer and tripmeter dis-
play must be set to “ODO”, other-
wise the tripmeter will be reset
instead.
Lo
Hi
ZAUM1308km/L L/100km
Lo
Hi
ZAUM1310
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